1. $$\frac{{{\text{pd}}}}{{{\text{t}}\eta }}$$
  2. $$\frac{{{\text{pd}}}}{{2{\text{t}}\eta }}$$
  3. $$\frac{{{\text{pd}}}}{{4{\text{t}}\eta }}$$
  4. $$\frac{{{\text{pd}}}}{{8{\text{t}}\eta }}$$
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1 Answers

Answer: Option 2

Let'

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